lanterna.cpp: In function 'void read()': lanterna.cpp:14: warning: format '%d' expects type 'int*', but argument 3 has type 'char*' lanterna.cpp:17: warning: format '%d' expects type 'int*', but argument 2 has type 'char*' lanterna.cpp:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result lanterna.cpp:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result lanterna.cpp:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result lanterna.cpp: In function 'void start_generating(const int&)': lanterna.cpp:28: warning: array subscript has type 'char' lanterna.cpp: In function 'void dijkstra()': lanterna.cpp:108: warning: array subscript has type 'char' lanterna.cpp:110: warning: array subscript has type 'char' lanterna.cpp: In function 'int main()': lanterna.cpp:131: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result lanterna.cpp:132: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result